CriticalVulnerability

CVE-2025-5277: aws-mcp-server command injection via crafted prompts

Source: NVD(opens in a new tab)
Identifier: CVE-2025-5277
Published: May 28, 2025
Record updated: October 9, 2026

Known exploitation: Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
EPSS: 1.3%

Summary

CVE-2025-5277 affects the aws-mcp-server MCP server, which is vulnerable to command injection under CWE-78. An attacker can craft a prompt that, once accessed by the MCP client, runs arbitrary commands on the host system. Snyk scored it CVSS 4.0 9.4 (Critical) with no user privileges required and user interaction required; NIST had not yet provided an assessment.

Mitigation

The source does not state a fix yet. Check the original advisory for updates.

Details

Scores and exploitation

CVSS score: 9.6(critical)
EPSS: 1.3%Estimated probability that this CVE is exploited in the next 30 days, from the FIRST Exploit Prediction Scoring System. Read on November 4, 2026.

Weaknesses and techniques

Weakness (CWE): CWE-78
CWE-78
Attack pattern (CAPEC): CAPEC-88

Classification

Attack type: Other
Attack sophistication: Trivial
AI component targeted: Plugin
Impact: Confidentiality,
Integrity,
Availability
Labels: security

How this record was produced

Summaries, mitigations and labels on this page are generated automatically from the source. The linked source is authoritative. The source gives this advisory a description and no title, so the title above is a headline generated from the source text.

Original source: https://nvd.nist.gov/vuln/detail/CVE-2025-5277

First tracked: February 15, 2026 at 08:52 PM ET, from NVD/CVE Database

Classifier: claude-haiku-5-5, prompt v4

Classifier confidence: 90% (self-assessed)

Topics

Model Context Protocol

Summary

Mitigation

Topics

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